Fastener



May 15, l1928.

1,670,281 F. S. CARR FASTENER Filed'June 14, 1924 I aven/Z021 Patented May l5, 1928.

UNITED STATES 1,670,281 PATENT OFFICE.

IBED S. CARR, OF NEWTON, MASSACHUSETTS, ASSIGNOB TO CARR FASTENER COM- PANY, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

FASTENER.

Application 1ed` June 1,4,

This invention aims to provide improvements in fasteners.

In the drawings, which show one illustrative embodiment of my invention Figure 1 is a front elevation of a erred form of my device;

Fi 2 is a section on the line 2 2 of Fig. 1, be1ng artly in elevation;

Fig. 3 is a rear elevation of the stud;

Fig. 4 is a bottom view of the; socket-engaging part of the stud;

Fig. 5 is a side elevation of the socket;

Fig. 6 is a front elevation of the socket; and` Fig. 7 is a section on the line 7-7 of Fig. 2.

Referring to the drawings of the fastener selected for illustrative purposes, I have shown a. stud secured to a liexible fabric, herein shown as the curtain 8 of an automobile. The means for securing the stud to` the curtain 8 includes a back plate 9 presenting a plurality of attaching prongs 11 which pass through the curtain and are clenched by a clench` plate 13 on the opposite side of the curtain 8, as illustrated in Fig. 2. i

`The stud has a socket-engaging part 15, which is pressed from a single sheet of metal and presents three longitudinal slots 17, which extend into the base 18 of the socketengaging part to permit contraction and eX- pansion when engagingand disengaging a socket. Afourth and wider slot 19 (Figs. 2, 3 and 4) at the bottom of the socket-en.- gaging part 15 presents apivot 20 intersecting the slot upon which is pivoted a latch or lever 21, which operates in the slot 19.

Both the socket-engaging part 15 and the lever 21 are supported by the back plate 9, as illustrated in Figs. 2 and 3, by providing a rectangular aperture 23 in the back plate 9 through which the socket-engaging part 15 and lever 21 project at either side of the back plate. The material at the upper edge of the aperture 23 (Fig. 3). provides a pivot 29, which engages a recess 31 in the socketengaging part 15, thus permitting pivotal movement between the clench plate 13, curtain 8 and back plate 9, as a unit, and the socket-engaging member. The lever 21 is held against its pivot 20 by the material at the lower edge of the aperture 23, and this edge is provided with a reversely bent porton t0 provide a smooth bearing surface pre- 1924. Serial No. 719,932.

for operating the lever 21. This reversely bent portion 33' acts upon the cam surface 35 of the tail of the lever 21 to move Lthe lever 21 about its pivot 20 thereby to rock. the upper end 37 of the lever, which lies within the socket-engaging part (Figs. 2 and 3) toward the open end ot' the socket-engaging member. .y

The socket-engaging part 15 and lever 21 are assembled with the back plate 9 by first placing the lever 21 upon its pivot 20 and then forcing the above-mentioned parts through the rectangular apertures 23 in the back plate 9. The diameter of the socketengaging part l'and'lever 21 combined is greaterthan the diameter of the `aperture so therefore the socket-engaging part is forced to contract, preterablyto a greater extent than when engaging a socket, so that' the upper and lower edges of the aperture 23 may be engaged with their respective dcpressions in the socket-engaging part 15 and the lever 21.

The socket, as illustrated, is of the flush type and includes a body part 39 adapted to fit into a recess 40` in the body 41 of an automobile, or like support. The body part 39 is preferably non-circular in cross-section, herein shown as elliptical, so that it may receive the elliptical head 43 of the attaching screw 45, thereby to prevent `relative `rotation between the'body part 39 and the attaching screw 45.

The attaching screw 1s secured in a fixed relation to` the body part 39 by a plurality of pedal-like projections 46 shaved from the attaching screw and clenched against the inner end ot the body part 39 of the socketmember as best illustrated in Figs. 2, 5 and 7.

The socket also includes a front plate 47, also elliptical in cross-section, and is secured to` the body part 39 by yclenching a part of the front plate 47 over an elliptical ianoe 48, integral with the front end of the body part, thereby providing an elliptical flange 49. Thus the parts of the socket so far described are secured together against rotation and may be secured to the body 41 of the car by itting a socket wrench over the flange 49 and rotating itin a clockwise direction. This produces a turning movement to the attaching screw 45 which screws into the body 41, thereby drawing the body part 15 into the recess 40. To prevent unsightly exposure of the scratcbeswhch would be .29 on the back made upon the `body ot' the car by the elliptical flange 49, I have provided a circular boss 5l, entirely concealed by the flange 49, which seats against the face of the body il, of the car and thus positions the flange slightly away from the body of the car so that it cannot scratch the surface thereof during attachment of the socket to the body of the car.

The front plate 47 presents a stud-receiving aperture 52 normally closed by a sealing disc 53 which is urged into apertureclosing position by a spring 54 seated at one end against the Yhead 43 of the attaching screw. This sealing disc presents a boss or locking part 56 normally extending into the stud-receiving aperture 52.

The stud may be engaged with the socket by pressing upon the front plate to urge the socket-engaging part 15 toward the stud-receiving aperture 52. As the head of the stud contracts it passes into the aperture and engages the locking part 5G, which is excluded from entering the yhead of the stud because of the contracted condition thereof. Thus the sealing disc 53 -is moved forward to permit passage of the head of the stud through the studa'eceiving aperture. The head of the stud then expands and the spring 54 urges t-he locking part into the head of the stud where it engages the inwardly turned edges 58 of the socket-engaging part l5, thereby preventing contraction of the head of the stud.

The fastener, as illustrated in Fig. 2, is locked against separation by a strain exerted upon the stud either at the sides thereof or toward the body of the curtain, thus providing a three-side lock.

Seperation of the stud from the socket is etl'ected by pulling upon thc lower edge of the curtain. This produces a tipping action of the attaching means about the pivot plate. 9, thereby moving the rcversely bent edge 33 along the cam edge 35 of the tail of the. lever 2l. Thus the lever 21 is tipped about its pivot 20 and forces the upper end 37 of the lever to move the locking part 56 of the sealing disc 53 out of engagement with the head of the stud. The head of the stud is then free to contract and may be disengaged from the socket by a further pull upon the curtain.

While I have shown and described a preferred form of one embodiment of my invention, it will be. understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode of operation, may be made without departing from the scope of my invention, whichis best deiined in the following claims.

Claims:

l. A three-side lock fastener comprising,

n combination, a socket ,presenting a studreceiving aperture, a cooperating stud including a contractiible and expansiblc socketengaging part, attaching means securing said part to a flexible stud-carrying medium, axially movable locking means forming part of the fastener assembly and locking said socket-engaging part against contraction when engaged in said stud-receiving aperture, and a lever pivotally assembled as a part of the stud assembly, said lever having a portion cooperating with the attaching means to perlmt operation of the lever by a pull exerted upon -one side of the stud-carrying medium thereby to shift said locking means and permit contraction of said socket-engaging part so that it may be disengaged from the socket.

2. A three-side lock fastener comprising, in combination, a socket presenting a studrcceiving aperture, a cooperating stud including attaching means comprising a front plate and a back plate secured to opposite sides of a. stud-carrying fabric, a contract ible and expansible socket-cngaging part pivoted upon said attaching means and engageable with said aperture, locking means forming part of the fastener assembly and locking said socket-engaging part in said aperture and unlocking means Jivoted upon said socket-engaging part and icing operatively connected to said attaching means so that tipping of said attaching means relative to said socket-engaging part, moves said locking means to permit disengagement of said stud from said socket.

3. A three-side lock fastener comprising, in combination, a socket presenting a studreceiving aperture, a cooperating stud including attaching means comprising a front plate and back plate secured to opposite sides of a stud-carrying fabric, a contractible 'and cxpansible socket-engaging part pivotied upon said attaching means and en# gageable with said aperture, locking means forming part of the fastener assembly and locking said socket-engaging part in said aperture and a lever pivotcd upon said socket-eugaging part and being operatively connected to said attaching means so that. tipping of said attaching means relativeto said socket-engaging part moves said locking means out of engagement with said socket-engaging part.

4. A three-side lock fastener comprising, in combination, a socket presenting a studrcceiving aperture. a stud including a contractible and expansible socket-engaging part secured to a flexible st\ulczn'ryi1ig fabric, a spring-pressed locking member forming part of the fastener assembly and locking said socket-engaging part in said stud-receiving aperture, a lever pivotcd upon said socket-engaging part and means forming part of the stud assembly and being operable to act upon said lever and shiftsaid locking member prior to disengagement of said socket-engaging part from said socket.

5. A three-side lock fastener comprising, in combination, a socket presenting a studreceiving aperture, a stud having a contractible and expansible socket-engaging part for engagement with said aperture, a spring-pressed locking part located in said 10 socket for locking said socket-engaging part in said aperture, attaching means securing said socket-engaging part to a fexble studcarryng medium and alever pivoted u on and between said socket-engaging mem er and said attaching means, said stud and socket being separable only by a pull at one 'edge of the stud-carrying medium.

In testimony whereof, I have signed my v name to this specification.

FRED S. CARR. 

